Ultra High Voltage Cable

Ultra High Voltage (UHV) cables are designed to transmit very high levels of electrical energy over long distances, typically at voltages above 500 kV. They are critical for modern power systems, especially in connecting remote energy sources to major cities and industrial centers.

500 Meters(MOQ)
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Product Description

Product Advantage

Improved Durability with top quality manufactured insulation ensuring full compliance with industry standards, designed to withstand extreme temperatures, moisture and physical harms
RRH Cable we have the capability to manufacture grade A 99.9% pure copper precisely stranded in the insulators for the best conductivity and efficiency
Thanks to our expert craftsmanship, we provide high-quality cables that minimize the need for frequent maintenance or replacements, significantly reducing long-term operational costs.

Ultra High Voltage Cable

Technical Parameters

Size (mm²)	AWG/kcmil	Voltage Class	Ampacity (A)	Insulation	Armor	Shielding	Conductor Material	Core Type	# Conductors	Temp Rating (°C)	# Strands
800 mm²	1600 kcmil	500–600 kV	1000A	XLPE / Oil-impregnated	Optional (SWA/STA)	Copper wire screen	Copper	Stranded	1C	90/130/250	127
1000 mm²	2000 kcmil	500–800 kV	1150A	XLPE / Oil-impregnated	Optional (SWA/STA)	Copper wire screen	Copper	Stranded	1C	90/130/250	127+
1200 mm²	2500 kcmil	600–800 kV	1300A	XLPE / Oil-impregnated	Optional	Copper wire screen	Copper	Stranded	1C	90/130/250	127+
1600 mm²	3200 kcmil	800–1100 kV	1600A	XLPE / Oil-impregnated	Optional	Copper wire screen	Copper	Stranded	1C	90/130/250	127–169
2000 mm²	4000 kcmil	800–1100 kV	1900A	XLPE / Oil-impregnated	Optional	Copper wire screen	Copper	Stranded	1C	90/130/250	169–200

Key Points

Voltage Range: 500 kV to 1100 kV (AC or DC systems)

Purpose: Efficiently transmit large amounts of power with minimal losses.

Types:

AC UHV cables (usually underground for urban areas)
DC UHV cables (for ultra-long distances, submarine, or cross-country transmission)
Conductor Material: Typically high-conductivity copper or aluminum.
Insulation: Advanced XLPE (cross-linked polyethylene) or oil-impregnated paper insulation for extreme electrical and thermal stress.
Applications: National grid backbones, renewable energy transmission, interconnection of countries, offshore wind, underground city supply.

Product Uses

Long-Distance Power Transmission carries bulk electricity from remote generation (hydropower, solar farms, wind farms) to cities.
National and Intercontinental Grids connects grids across states or countries with minimal losses.
Renewable Energy Projects moves clean energy (wind, hydro, solar) from faraway locations to populated centers.
Urban Bulk Power Delivery, underground or underwater UHV cables bring large power supplies into crowded cities where overhead lines aren’t possible.
HVDC Systems (High Voltage Direct Current) essential for modern DC transmission corridors that cross mountains, seas, or deserts.
Offshore Wind Farms and Islands transfers huge power outputs from offshore platforms to mainland grids.

Product Operate Guide

Apply cable base on its insulation property
Always de-energize the system before working on cables
Proper PPE duing operation

Key Features

Feature	Why It Matters
Rated for 500 kV to 1100 kV	Enables ultra-long distance and large-scale power transmission with minimal losses.
Advanced XLPE or Oil-Impregnated Insulation	Withstands extreme electrical and thermal stress, ensuring cable reliability under UHV conditions.
Copper or Aluminum Conductors	Offers the best balance between conductivity (copper) and weight/cost efficiency (aluminum).
Stranded, High-Purity Conductors	Improves flexibility, reduces skin effect losses at very high frequencies.
Single-Core Design	Reduces magnetic fields, simplifies electrical behavior at ultra high voltages.
Metallic Shielding	Provides electromagnetic containment and fault protection, ensuring safe operation.
Armored Options Available	Enhances mechanical protection, especially important for underground or submarine cables.
High Thermal Ratings (90°C Normal, 130°C Overload, 250°C Short Circuit)	Maintains operational stability during overloads or faults without immediate damage.
Water Blocking and Sealing Systems	Extends cable life by preventing moisture ingress, critical for underground/submarine use.
Low Loss Dielectric Design	Minimizes energy loss during transmission, improving system efficiency and reducing operating costs.
Design Life 40–50+ Years	Provides a reliable, long-term investment for national grids and megaprojects.

Notes

Term	Meaning
Armor	SWA = Steel Wire Armor; STA = Steel Tape Armor; usually optional for underground/submarine.
Shielding	Copper tape or copper wire screen around each conductor, critical for UHV to manage high electrical fields.
Insulation	XLPE (modern dry type); Oil-impregnated (historical type for some UHV AC or DC systems).
Core Type	Almost always single core (1C) for UHV to avoid phase interference.
Temperature Ratings	90°C normal operation, 130°C emergency overload, 250°C short-circuit condition.
Stranding	High-strand count to improve cable flexibility, reduce skin effect, and ease installation stress.